| 摘要 |
Disclosed is a multilayer ceramic substrate with high flexural strength, which is suppressed in warping and hardly suffers from delamination. Specifically disclosed is a multilayer ceramic substrate having a multilayer structure composed of an inner layer portion (3) and surface layer portions (4, 5). The thermal expansion coefficient of the surface layer portions (4, 5) is lower than that of the inner layer portion (3), and the difference between the thermal expansion coefficient of the surface layer portions (4, 5) and that of the inner layer portion (3) is 1.0 ppmK-1 or more. The weight ratio of the components common to the material constituting the surface layer portions (4, 5) and the material constituting the inner layer portion (3) is not less than 75% by weight. |
